#include<stdio.h>
int main()
{
	int num=1;
	printf("%d\n",num);
	if(num>0)
	{
		int num=2;
		printf("%d\n",num);
		if(num>0)
		{
			int num=3;
			printf("%d\n",num);
		}
		printf("%d\n",num);
	}
	printf("%d\n",num);
	return 0;
}
